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Sanhekou Industrial Park, Zhenglu Town, Changzhou
Changzhou Xianzhu Drying Equipment Co., Ltd
Technological principle and wide application of centrifugal spray dryer
Date: 2025-09-08Read: 3
Centrifugal spray dryer is an efficient drying equipment. Its core process principle is to break liquid materials into tiny droplets through centrifugal atomizer, and achieve instant drying by fast contact with hot air. The specific process can be divided into four stages:
1. Atomization stage: The liquid material is transported by a high-pressure pump to a high-speed rotating centrifugal disk (usually 60-160m/s), where it forms mist like droplets with diameters ranging from tens to hundreds of micrometers under the action of centrifugal force;
2. Hot air contact: The filtered and heated air (150-300 ℃) enters the drying chamber through a spiral distributor and comes into contact with the droplets in parallel or counter current;
3. Quick drying: Droplets evaporate 95% -98% moisture within 5-15 seconds, forming powder or particles, especially suitable for heat sensitive materials;
4. Product collection: The dried finished product is discharged through a cyclone separator (with a recovery rate of 93% -96%) and a vibration device, and the exhaust gas is discharged after dust removal treatment.
This technology has significant advantages:
1. Efficiency: The surface area increases after atomization, resulting in high heat transfer efficiency;
2. Wide adaptability: it can handle solutions and lotion with moisture content of 40% -90%, and directly convert them into powder/particles;
3. Strong controllability: By adjusting parameters such as centrifugal speed and feed rate, the particle size of the product can be precisely controlled.
Its application areas cover multiple industries:
1. Food industry: milk powder, coffee powder, seasonings, etc., retain nutrients and flavors;
2. Pharmaceutical and chemical industries: pharmaceutical raw materials, catalysts, pigments, etc., to ensure the stability of active ingredients;
3. Environmental Protection and Materials: Processing mineral waste and ceramic raw materials to improve uniformity and sintering activity.
Special designs such as cold air jackets and pneumatic vibrators can solve problems such as wall sticking and moisture absorption, further expanding their application scenarios.
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